Switching device.



D. D. GORDON. SWITGHING DEVICE.

APPLICATION FILED SVT. 10, 1912.

Patented Mar. 31, 19M..

UNITED sTATnsiTENT OFFICE.

DAVID D. GORDON, 0F CHICAGO,'LLINOIS, ASSIGNOR TO THE'YOST ELECTRIC Il\flL1\l'U-'I FAG-TUBING COMPANY, 0F TOLEDO, OHIO, A CORPORATION OF OHIO.

SWITCHING DEVICE.

To fill w71 om it may concern Be it known that I, DAVID I). GORDON, a citizen of the United States, residing at Chicago, in the county of Cook and State ot' Illinois, have invented a certain new and useful Improvement m Switching Devices,

of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification,

vMy invention relates to switching devices and has for its object the provision of an improved device of this character which nds its application among others very advantageously in connection with lamp sockets, for instance.

'It will of course be understood that in describing my invention herein as specifi cally employed in connection with an electric lamp socket, that my invention is not to be so limited, but its principle will be readily apparent from the specific description of a particular socket which I will now describe in connection with the accompanying drawing setting forth lsuch embodiment of my invention, in which- Figure 1 is a sectional view of a socket constructed in accordance with my invention; Fig. 2 is a partial sectional view on line a-a of Fig. 1; Fig. 3 is a partial sectional view on line b-b of Fig. l; Fig'. 4 is a fragmentary view in perspective of certain parts set fort-h more clearly in Fig. 3, which parts here are shown as separated for clearness of illustration; Fig. 5 isa view of a modification of the structure shown in Fig. 3; Fig. 6 is a sectional view on lineic-c of Fig. 1; Fi 7 is a side view ofthe upper portion ot the socket showing the novel manner of holding the Socket parts together, and Fig. 8 is a sectional view on line rZ-cl of' Fig. 7.

My invention is more particularly to that character of electric lamp sockets which are in the art known as pull sockets, by which I mean a socket which is provided with a chain or other suitable structure, which chain when pulled operates the switching device in such manner that successive operations ot' the chain will successively make or break the switch elements so that with each operation of the chain the circuit through the lamp is `either made or extinguished.

5r Referring more particularly to Fig. 1, I

Specification of Letters Patent.

Application flied September 10, 1912.

herein shown as applied' Patented Mar. 31, 1914.

Serial No. 719,564.

show theshell 1 of a socket which is provided with the cap 2, which parts 1 and :2 are fastened together as shown more in detail in Figs. 1, 47 and 8. For the purpose of thus holding these parts together so that they may be readily separated when it is desired to do 'so the shell 1 is provided with a'split ring 3 which occupies a recess provided in the shell 1 as shown in Fig. l. The shell 1 is also provided with suitable pins Ll. The lower portion of the cap 2 has a sort of wavy outline as indicated at 5 in Fig. 77 and this cap 2 is likewise provided with a recessed portion as shown more clearly in Fig. 1' so 'that this cap may when placed in position have its yrecess. register with the split spring ring 8 thus to hold the two parts together. ANow in order to easily separate the parts the cap 2 is rotated so that its lower wavy edge rides over the pins 1, thereby forcing this spring cap up from the shell l, in other words, moving the cap upwardly out of engagement with the spring rin@ 3. It will be understood of course that wthen the parts are in their normal assembled condition the pins 4 must occupy one of the in dentations of the cap Q as shown in Fig. 7.

The switching device which forms the subject matter of my invention herein consists preferably of two contact plates 6 and 7 respectively, the contact plate 7 being continued through the bar 8 to the contact element 9 which is used for the middle con tact ofthe socket. The contact element 6 has a binding' screw 7'@l by means of which this contact element 6 is connected to the supply circuit. A second binding post 10 is provided for connection to the supply circuit ivhich through the agency of bus bar 11 connects by means of a screw 12 to the screw ,threaded inner terminal 13 of the socket. In order to complete the circuit to the lamp therefore, contact must be established between the elements (3 and 7y and this I accomplish through the agency of a contact element 14 in this instance shown as a sphere. This sphere is controlled through a resilientA member, preferably a spiral spring 15, one extremity of which engage-s the ball 14, the other extremity of which.

spring is held in place over a projection 16 f second oscillatory element 19A shown more clearly' in. Fig. 3.' Whenever the element 1? is'in the position shown j nYFig. 2 contact is established betweenv the elements 6 and 7 through the agency of the ball 14. New if the element 17 (Fig. 2) is rotated contrau oiockwise, then the projection 16, before this'eiement 1T reaches its alternative limiting position has passed beyond the center line between the shaft 18 and the center the hall in its then position. Immediately this pnojectionl' has passed. beyond, the centerline aforesaid it exerts a 'snap action pressure against the ball 14: to force it into the dotted position shown in Fig. 2 at which time` contact between'the elements 6 and 7 is broken.' Now `if the.,element 17 is then rotated .clockwise "a sito-iler action takes place' as regards the projection 16 passing the centerl line and theiball 14:l is again forced into the position itis shown as 'occupying in Fig. 2. Now this reciprocatory motion of the element 17 is brought about through the element-19 and theinstrumen talities associated therewith. To' bring about this oscillatory motion of the element 19 which moves coniointijr with the element 17, I provide this element 19 with a slot 2O :having slightly'enlarged portions at 21, 21. A. sort of sliding guide 22 is thus pro-v vided in the element 19 along which a roller 23 carried by a crosshead '24 may slide. This crosshead 24; is controlled by a chain 25 which chain preferably passes outside of thel socket through the bell shaped opening 26. A spring 27 tends to force thecross-head '24 away from the inner mouth 28. of the element 26,`the extremities of'this spring abutting respectively said mouth 28 and said crosshead 24.

Referring now specifically to Fig. f1, if the chain 25 is pulled to the right, the roller 23 resting in the recess 21 draws the element 19 in a contra-clockwise direction and this continues until the projection 16 of the element 17y has passed beyondV the center line above referred to, at which time the spring 15 completes the movements of lthe elements 17 and 19 into'their limiting position, at the same time that it forces the ball 14.5 into its .alternative position. .lf the pull on the chain 25 is 'then released, the spring 27 forces this crossheacl 24 to its alternative position at the opposite eXtremity of the slot 20. vBy again pulling,r on the chain 25 the roller 23 engages the alternative recess 21 and'fciaws the element 19 and consequently the element 17 by clockwise rotation through the assistance of the spring 15 to the limiting positions occupied. by these elements-as shown in Figs. 2 and. 3.

It Will thus he seen that I have provided acentos 3G, which element 294 rolls along an oscillating quadrant 17?. 'A .spring 15 tends to hoicl the rollin-29 against the guide surface -of the element 17a. When' this element 17 ie roscillatin;,g from one position toward the other, the spring 15?, when dead center is paused, serves to force the element 29 into one or the other ci its alternative positions as .tlie case may be. ertain contactelements 3.1 may then be provided. in associa'- tion With the element 29.

\ Having 'thus' described one particular form which my invention may 'take to thus illustrate its principle, what claim as new and desire to secure hy Letters Patent is:

In a device of the character described the. combination with a circuit controlling element, a movable element having resilient means interposed 'between it and said controlling element to control the position ci? said circuit controlling element, a. second movable element attached. to the irst aforosaid movable element and. having a runway, a sliding carriage '.for said runway, a ieXible tension, 'mernher to move said. carriage, and av spring'acting against carriage tending; to hold it in either one of its limi# ing positions.

2. In a device o the character described the combination with circuit controlling element, a movable element having resilient means interposed between it and. said con trolling element to control the position of said circuit controlling" element, a. second movable eieinent attached. to the tiret aforesaid movable element and having a runway, a sliding carriage for said runway, a iiexilile tension memherto move said` carriage, and a spring acting against said carriage ten iing to hold itin either one of its limiting positions, said movable elements both being mounted on the same pivotally mounted shaft. l

'In Witness whereof, l hereunto subscribe my naine this 3rd day of September, A- l., uns.y

DAVE) l?. GRON.

Witnesses Mex lV. KABEL, Hazan Jonas( 

